This was a Chicago client who needed a site for their real estate company, which also dealt with integrating third party programs for MLS listings.  The template and internal content system was all custom configured with a Drupal 6 installation. 

Here is a bit from their home page.

Atlas Realty Group, Inc. is a family owned, full-service real estate company offering elite professional services in residential sales (buying and selling), property management, commercial/investment sales and leasing.